The COLLE family may have immigrated to Montreal through Rio de Janeiro, Brazil, not Buenos Aires, Argentina. There is disagreement among family members about this
MY ORIGINAL EMAIL IS BELOW:
I have been unable to find the ship that transported my great-grandparents and their several children who arrived in Montreal in 1900 from Romania. There is a possibility that they first went to Buenos Aires, Argentina  and from there made their way to Montreal.  Can someone please tell me the most likely seaports they would have used, or direct me somewhere to try and find that ship and manifest? Their names used in Montreal and on the Canadian census were:
Father: Jacob Joseph COLLE
Mother: Rebecca COLLE (nee Schecter)
Children: Eliza (Liza), Sarah (Lieb), Millie (Molly), Marie (Mary, May), Betse (Beatrice), Charles and  William
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Anne Lobel Armel
annearmel@...
LOBEL, RUDISH, HERSCOVITCH, COLLE, SCHECTER